Integrity Windows

Integrity® from Marvin Windows and Doors - Built to Perform®

Virtually maintenance-free Fiberglass exterior

Unmatched Durability and longevity

Outperforms and Outlasts vinyl and aluminum

The Ultrex® Fiberglass Advantage

Strong, stable, durable and virtually indestructible, Ultrex®is possibly the perfect building material, creating windows that leave other materials in the dust.

Wood-Ultrex® Windows

Features exteriors of Ultrex® fiberglass and beautiful, real wood interiors.

All Ultrex® Windows

Exceptional aesthetics, outstanding durability, unbeatable performance.  Virtually indestructible exteriors in six finishes.  Low-maintenance classic white profiled interiors.

IMPACT Products

Impact/Wind Zone 3 rated for winds up to 140 mph.  Resists corrosion and UV degradation while withstanding heat up to 350°; so it’s perfectly suited to resist the salt, heat, sun, wind and humidity that accompany coastal living.

Energy Efficiency

Countless options that meet or exceed ENERGY STAR® requirements, making it easy to find the right energy-efficient option for your climate.

The full line of Integrity® Windows

IMPACT products for coastal living

IMPACT windows feature an extra-strong Ultrex fiberglass exterior that is built to withstand hurricane-force winds. Additional safety locks maintain a low profile that go unnoticed when not in use. Inside you’ll find an elegant wood finish to match your style. Casement and Awning windows feature sleek, contemporary frames that can accommodate large panes of glass, yet still swing open to let in fresh air.


Durability and style-that’s Integrity from Marvin. Featuring the strength and beauty of Ultrex® pultruded fiberglass construction, Integrity fiberglass windows come in full line of popular styles. All Ultrex windows look incredible and their 100% fiberglass construction outperforms and outlasts vinyl, aluminum and composite materials. Wood-Ultrex windows combine an authentic wood interior with a virtually indestructible fiberglass exterior. Factor in our IMPACT Products for coastal applications and there is no doubt Integrity windows are Built to Perform®.


Dream big with All Ultrex Polygon windows. Rectangles, triangles, pentagons and more-8 unique shapes in all-give you the freedom to create almost any window arrangement you desire. And thanks to the strength and precision of Ultrex pultruded fiberglass, Integrity Polygon windows can be as large as 49 square feet with a maximum span of up to 9 feet.

Round Top

All Ultrex Series Round Tops are the one curved-edge window whose strength matches its beauty. Made from glass-reinforced composite and finished with Integrity’s acrylic capping technology, you get a stunning complement to any Integrity All Ultrex Series window that will last for years.


Glider windows are the perfect alternative to Casement windows where a swinging sash is not practical. Each Integrity Glider window is manufactured specifically for horizontal operation, unlike other gliders that are essentially Double Hung windows turned on their sides. The strong Ultrex fiberglass interior and exterior ensures the window glides smoothly and stays true on even our largest Glider windows.

Casement / Awning

Integrity All Ultrex Casement and Awning windows are quite simply some of the best-built windows you’ll ever find. With a virtually indestructible Ultrex pultruded fiberglass frame and dual-arm roto gear operation, you can count on dependable operation for the life of the window. The low-resistance crank make this an ideal window for almost any room that needs a little fresh air.

Single Hung

The performance of maintenance-free Ultrex fiberglass is now available in this affordable Single Hung window. Traditional styling and sleek sightlines match the appearance of Integrity Polygon windows to create beautiful assemblies when paired together.

Double Hung

This classic window style gets a contemporary twist with an Ultrex fiberglass exterior and interior delivering high style and a durable finish from every angle. Double Hung windows are ideal for second floor bedrooms or as part of a beautiful bay window combination. Both the top and bottom sashes tilt inward for easy cleaning.

Product Photos

Integrity from Marvin Windows and Doors - All Ultrex Double Hung Windows Interior
Integrity from Marvin Windows and Doors - All Ultrex Glider and Polygon Windows
Integrity from Marvin Windows and Doors - Wood Ultrex Double Hung WIndows Interior
Integrity from Marvin Windows and Doors - Glider Window Interior
Integrity from Marvin Windows and Doors - Impact Resistent Casement Windows

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